Update Serika themes for inlay-hints (#6344)

runtime/themes/serika-dark.toml

@@ -18,7 +18,7 @@
 "variable.property" = "yellow"
 "label" = "aqua"
 "punctuation" = "grey0"
-"punctuation.delimiter" = "grey2"
+"punctuation.delimiter" = "bg4"
 "punctuation.bracket" = "fg"
 "keyword" = "red"
 "operator" = "grey0"
@@ -52,6 +52,7 @@
 "ui.selection" = { bg = "bg3" }
 "ui.virtual.whitespace" = "bg2"
 "ui.virtual.ruler" = { bg = "grey2" } 
+"ui.virtual.inlay-hint" = { fg = "grey2", modifiers = ["italic"] }
 
 "hint" = "blue"
 "info" = "aqua"

runtime/themes/serika-light.toml

@@ -52,6 +52,7 @@
 "ui.selection" = { fg = "bg0", bg = "bg3" }
 "ui.virtual.whitespace" = { fg = "bg2" }
 "ui.virtual.ruler" = { bg = "bg01" }
+"ui.virtual.inlay-hint" = { fg = "grey2", modifiers = ["italic"] }
 
 "hint" = "blue"
 "info" = "aqua"